1. By Brian Broderick & Emily Majsak

2. Climate Precipitation and temperature vary with freshwater’s location Alpine9”24°F Tropical Forest24-93”77°F Tropical Grassland29-66”68°F Desert2-9”64°F Temperate Grassland10-30”50°F Deciduous Forest29”48°F Coniferous Forest18”33°F Tundra 7”19°F

3. Global Distribution

4. Regional Variations Standing water – lakes, ponds Moving water – rivers, deltas Wetlands – floodplains, mangrove swamps, bogs, marshes

5. Resources Medicine Specie habitats (40% species, 12% animal species) Food (rice, sago palm) Drinking water Fuelwood Fibers (paper, clothing) Flood control

6. Changes Throughout Geologic Time Where Glaciers used to be, now we’ve got lakes and rivers ‘Older’, more nutrient rich = Eutrophic ‘Middle Aged’, medium amount of nutrients = Mesotrophic ‘Younger’, less nutrients = Oligotrophic Lakes haven’t changed much, per say

7. Unique Plant & Animal Adaptations

8. Threats Direct Changes – strictly human, filling, grading, removal of vegetation, construction, changes in water levels and drainage patterns Indirect Changes – natural changes, influx of surface water and sediments, fragmentation of a wetland, loss of recharge area, changes in drainage patterns